643461014243 has 2 divisors, whose sum is σ = 643461014244. Its totient is φ = 643461014242.

The previous prime is 643461014233. The next prime is 643461014263. The reversal of 643461014243 is 342410164346.

643461014243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 643461014243 - 2¹⁰ = 643461013219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 643461014197 and 643461014206.

It is not a weakly prime, because it can be changed into another prime (643461014233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321730507121 + 321730507122.

It is an arithmetic number, because the mean of its divisors is an integer number (321730507122).

Almost surely, 2^643461014243 is an apocalyptic number.

643461014243 is a deficient number, since it is larger than the sum of its proper divisors (1).

643461014243 is an equidigital number, since it uses as much as digits as its factorization.

643461014243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 38.

Adding to 643461014243 its reverse (342410164346), we get a palindrome (985871178589).

The spelling of 643461014243 in words is "six hundred forty-three billion, four hundred sixty-one million, fourteen thousand, two hundred forty-three".